{
  "fix": "Microsoft Edge WebView2 Runtime 143.0.3650.66",
  "url": "https://patchblox.com/security/fix/windows-app/microsoft.edgewebview2runtime-143.0.3650.66",
  "summary": "Microsoft Edge WebView2 Runtime 143.0.3650.66, released December 4, 2025, fixes 14 CVEs in Microsoft Edge WebView2 Runtime. None of them is reported as exploited. Patch Radar priority: High. The latest Microsoft Edge WebView2 Runtime is 157.0.4341.42, which also fixes every one of these CVEs.",
  "platform": "windows-app",
  "type": "app-version",
  "title": "Microsoft Edge WebView2 Runtime 143.0.3650.66",
  "released": "2025-12-04T00:00:00Z",
  "priority": "High",
  "priorityTier": 3,
  "priorityReason": "Closes CVE-2025-13633, high severity",
  "supported": true,
  "cveCount": 14,
  "exploitedCveCount": 0,
  "kevCveCount": 0,
  "ransomwareCveCount": 0,
  "maxEpss": 0.00502,
  "maxCvss": 8.8,
  "appliesTo": [
    {
      "product": "Microsoft Edge WebView2 Runtime",
      "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime",
      "fixedVersion": "143.0.3650.66",
      "latestVersion": "157.0.4341.42",
      "supported": true
    }
  ],
  "supersededBy": {
    "product": "Microsoft Edge WebView2 Runtime",
    "latestVersion": "157.0.4341.42",
    "productUrl": "https://patchblox.com/security/product/windows-app/microsoft-edge-webview2-runtime"
  },
  "cves": [
    {
      "cveId": "CVE-2025-13633",
      "url": "https://patchblox.com/security/cve/CVE-2025-13633",
      "title": "Chromium: CVE-2025-13633 Use after free in Digital Credentials",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00502,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13630",
      "url": "https://patchblox.com/security/cve/CVE-2025-13630",
      "title": "Chromium: CVE-2025-13630 Type Confusion in V8",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00457,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13631",
      "url": "https://patchblox.com/security/cve/CVE-2025-13631",
      "title": "Chromium: CVE-2025-13631 Inappropriate implementation in Google Updater",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00419,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13720",
      "url": "https://patchblox.com/security/cve/CVE-2025-13720",
      "title": "Chromium: CVE-2025-13720 Bad cast in Loader",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00331,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13638",
      "url": "https://patchblox.com/security/cve/CVE-2025-13638",
      "title": "Chromium: CVE-2025-13638 Use after free in Media Stream",
      "priority": "High",
      "severity": "high",
      "cvss": 8.8,
      "epss": 0.00318,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13639",
      "url": "https://patchblox.com/security/cve/CVE-2025-13639",
      "title": "Chromium: CVE-2025-13639 Inappropriate implementation in WebRTC",
      "priority": "High",
      "severity": "high",
      "cvss": 8.1,
      "epss": 0.0031,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13721",
      "url": "https://patchblox.com/security/cve/CVE-2025-13721",
      "title": "Chromium: CVE-2025-13721 Race in v8",
      "priority": "High",
      "severity": "high",
      "cvss": 7.5,
      "epss": 0.00258,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-62223",
      "url": "https://patchblox.com/security/cve/CVE-2025-62223",
      "title": "Microsoft Edge (Chromium-based) for Mac Spoofing Vulnerability",
      "priority": "Routine",
      "severity": "Low",
      "cvss": 4.3,
      "epss": 0.00466,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13637",
      "url": "https://patchblox.com/security/cve/CVE-2025-13637",
      "title": "Chromium: CVE-2025-13637 Inappropriate implementation in Downloads",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.0025,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13632",
      "url": "https://patchblox.com/security/cve/CVE-2025-13632",
      "title": "Chromium: CVE-2025-13632 Inappropriate implementation in DevTools",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 5.4,
      "epss": 0.00243,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13636",
      "url": "https://patchblox.com/security/cve/CVE-2025-13636",
      "title": "Chromium: CVE-2025-13636 Inappropriate implementation in Split View",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.3,
      "epss": 0.0024,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13635",
      "url": "https://patchblox.com/security/cve/CVE-2025-13635",
      "title": "Chromium: CVE-2025-13635 Inappropriate implementation in Downloads",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.4,
      "epss": 0.00183,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13640",
      "url": "https://patchblox.com/security/cve/CVE-2025-13640",
      "title": "Chromium: CVE-2025-13640 Inappropriate implementation in Passwords",
      "priority": "Routine",
      "severity": "low",
      "cvss": 3.5,
      "epss": 0.0018,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    },
    {
      "cveId": "CVE-2025-13634",
      "url": "https://patchblox.com/security/cve/CVE-2025-13634",
      "title": "Chromium: CVE-2025-13634 Inappropriate implementation in Downloads",
      "priority": "Routine",
      "severity": "medium",
      "cvss": 4.4,
      "epss": 0.00167,
      "kev": false,
      "ransomware": false,
      "exploited": false,
      "disclosed": false
    }
  ],
  "dataAsOf": "2026-11-11T07:45:43Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}